If Stock Prices Follow a Random Walk,it Means

Multiple Choice

If stock prices follow a random walk,it means

A) long periods of declining prices are followed by long periods of rising prices.
B) the greater the number of consecutive days of price declines,the greater the probability prices will increase the following day.
C) stock prices are unrelated to random events that shock the economy.
D) stock prices are just as likely to rise as to fall at any given time.